The player is amazing you play along with score at any speed you can transpose to a different key and mute the backing tracks.The standalone Avid Sibelius is very expensive but the Plugin uses part of the Sibelius engine. So the audio quality is superb and a bargain plugin at £1.99You only have to get a friend or bandmaster that has Avid Sibelius and convert a midi file to a *.sib

I can send you some samples if you wish in PDF or *.sib.

There is another scorch program for a PC but is quite different although freeIt is very basic and fussy about browsers.

Arts Centre Melbourne's iPad Choir presents a new way to participate in Choral Singing.Singers are sourced from community choir across Victoria,and digital sheet music scores delivered to participant's iPads via the Avid Scorch app